Metal-joining compound



UNITED STATES PATENT OFFICE.

JOHN A. GURLEY, 0F G-LENS FALLS, NEW YORK.

METAL-JOINING COMPOUND.

No Drawing.

To all whom it may concern:

Be it known that I, JOHN A. CURLEY, a citizen of the United States, residing at Glens Falls, in the county of Warren and State of New York, have invented certain new and useful Improvements in Metal- Joining Compounds, of which the following is aspecification.

This invention relates to improvements in metal Working and it is the principal object of the invention to provide a compound for use in the joining of steels differing in grades, such for instance, as high speed steels and soft steels, whereby the same will be effectually joined without liability of degeneration, thus rendering the same especially desirable in the utilization of scraps of high speed steel such as employed for cutting tools 011 metal working machines, which by reason of their size cannot be securely held in the usual holders, whereby said scraps can be united with shanks formed of soft steel and completely used; the shanks of soft steel of course affording bodies of sufi'icient size for reception in the tool holders and thereby effecting a material saving upon part of a user.

I am well aware that numerous attempts have been heretofore made in the art to unite the herein specified grades of steel by various brazing and welding processes. However, such processes have fallen short of the desired objects primarily, because of the high temperature required, which as will be readily understood by those skilled in the art, will change the entire structure of the high speed steel with the result that the same is rendered unfit for use as cutting tools inasmuch as the heat resisting qualities thereof have been entirely destroyed; it being borne in mind in this connection, that in the heat treating of high speed steel it should not exceed a temperature of approximately 2000 F. With my improved metal joining or uniting compound the above noted disadvantages are entirely eliminated and are, above other advantageous features, obtained by the use thereof, one embodiment of which Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed April 2, 1918. Serial No. 226,281.

is herein contained for the purposes of illustration.

As stated above, one embodiment of the compound is given, although it is to be un derstood that the various ingredients as well as the relative proportions thereof may be modified or varied, such as conditions or preference may dictate.

Zinc 10.22% Copper 17.78% Boric acid 63 Zinc sulfate 3.96% Sulfate of copper 3.96% Carbonate of iron .7 2% Chlorate of potash 36% The compound may of course be applied to the pieces of metal to be united thereby in various ways and by various methods such as set forth in my pro-pending United States application for Letters Patent; the same being applied to the surfaces of the pieces of metal when heated, whereupon said surfaces of the metal are engaged and effectually joined thereby.

Metal bodies joined with my compound will be provided with a highly effectual and positive bond, thus permitting the same to be ground after which they may be used as the cutting tools in connection with metal working machines; loosening of the same by heat generated due to friction or by vibration being obviated.

I claim;

1. A compound for use in uniting metals diflering in quality comprising zinc, copper, boric acid, zinc sulfate, sulfate of copper, carbonate of iron and chlorate of potash.

2. A compound for use in the uniting of metals differing in quality including in the herein statedproportions, zinc 10.22%, copper 17.78%, boric acid 63%, zinc sulfate 3.96%,

sulfate of copper 3.96%, carbonate of iron JOHN A. CURLEY.

Coziies of this patent may be obtained for five cents each, by addressing the commissioner of I'atents, Washington, D. G." 

